History of Metal Spraying in Japan before the Second World War

Abstract

The paper describes a history of metal spraying in Japan before the Second World War. In 1916, M.U.Schoop was granted a basic patent for the metal spraying in Japan. In 1921, K.Ezawa had begun the commercialising of the metal spraying in Japan. In 1923, T.Ezawa had been granted a patent for the metal spraying used electric arc gun. In Japan, this process was used since. In spite of these successes, in 1921-1935, the metal spraying was not used extensively and a remarkable technical progress did not take place in Japan. Little attention was directed to improving the quality of the spray coated film at this stage. In the latter half of the period 1921-1945, the use of the metal spraying extended in Japan. This process made a progress with regards to both the applications in practice and the researches in laboratory. Nevertheless, the metal spraying was looked upon with some scepticism in those early days because the adhesive strength of the spray coated film to a substrate was quite small. In Japan, a real advance in the use of the metal spraying take place after the Second World War.